When You Send a Wave Pulse Down a Rope or Slinky

Multiple Choice

When you send a wave pulse down a rope or Slinky, it eventually dies out. What has become of the energy?

A) It was transformed into thermal energy.
B) It was transformed into electromagnetic energy.
C) It was transformed into Italian sausage.
D) It was transformed into elastic energy.
E) It vanished because energy is always lost in all physical processes.